diff options
Diffstat (limited to 'nscd/mem.c')
| -rw-r--r-- | nscd/mem.c | 52 |
1 files changed, 25 insertions, 27 deletions
@@ -1,25 +1,26 @@ /* Cache memory handling. - Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2004. - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License version 2 as - published by the Free Software Foundation. + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #include <assert.h> #include <errno.h> #include <error.h> -#include <fcntl.h> #include <inttypes.h> #include <libintl.h> #include <limits.h> @@ -33,6 +34,12 @@ #include "nscd.h" +/* Maximum alignment requirement we will encounter. */ +#define BLOCK_ALIGN_LOG 3 +#define BLOCK_ALIGN (1 << BLOCK_ALIGN_LOG) +#define BLOCK_ALIGN_M1 (BLOCK_ALIGN - 1) + + static int sort_he (const void *p1, const void *p2) { @@ -187,7 +194,7 @@ gc (struct database_dyn *db) highref -= BLOCK_ALIGN; } - /* Now we can iterate over the MARK array and find bits which are not + /* No we can iterate over the MARK array and find bits which are not set. These represent memory which can be recovered. */ size_t byte = 0; /* Find the first gap. */ @@ -479,26 +486,17 @@ mempool_alloc (struct database_dyn *db, size_t len) if (! tried_resize) { /* Try to resize the database. Grow size of 1/8th. */ + size_t new_data_size = db->head->data_size + db->head->data_size / 8; size_t oldtotal = (sizeof (struct database_pers_head) - + roundup (db->head->module * sizeof (ref_t), ALIGN) + + db->head->module * sizeof (ref_t) + db->head->data_size); - size_t new_data_size = (db->head->data_size - + MAX (2 * len, db->head->data_size / 8)); size_t newtotal = (sizeof (struct database_pers_head) - + roundup (db->head->module * sizeof (ref_t), ALIGN) + + db->head->module * sizeof (ref_t) + new_data_size); - if (newtotal > db->max_db_size) - { - new_data_size -= newtotal - db->max_db_size; - newtotal = db->max_db_size; - } - if (db->mmap_used && newtotal > oldtotal - /* We only have to adjust the file size. The new pages - become magically available. */ - && TEMP_FAILURE_RETRY_VAL (posix_fallocate (db->wr_fd, oldtotal, - newtotal - - oldtotal)) == 0) + if ((!db->mmap_used || ftruncate (db->wr_fd, newtotal) != 0) + /* Try to resize the mapping. Note: no MREMAP_MAYMOVE. */ + && mremap (db->head, oldtotal, newtotal, 0) == 0) { db->head->data_size = new_data_size; tried_resize = true; |